Dipper-tooth



W. S. McKEE.

DIPPER TOOTH.

APPLICATION FILED FEB. 18. 1920.

1,395,048 Patenfed 0012. 25, 1921.

17 glll INVENTOH UNITED STATES PATENT OFFICE.

WALTER S. MOKEE, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION OF MAINE.

DEEPER- TOOTH.

Specification of Letters Patent.

Application filed February 18, 1920. 'Serial N0. 359,656.

To all whom it may concern:

Be it known that I, WALTER S. MoKnE, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have made and invented certain new and useful Improvements in Dipper- Teeth, of which the following is a specification.

My invention relates to dipper teeth for excavating and dredging buckets, and particularly to the wearing extremity of the teeth usually formed as separate and renewable points.

I have found that the wearing points of dipper teeth, as heretofore constructed, rapidly dull and become blunt in service due to the greatest wear taking place at the front extremity of the dipper points. This dulling and blunting of the wearing points of the teeth prevents the dipper bucket from operating at its maximum efliciency. It is accordingly an object of my invention to provide a dipper tooth point, which is so designed and constructed that it will tend to remain sharp throughout its useful wearing life.

A further object is to accomplish the aforementioned ends and at the same time embody within the tooth point suflicient rigidity and strength, so as to prevent its breakage or fracture in service and to incorporate in the wearing body of the point suflicient metal, so as to provide for the long and useful wearing life thereof.

With the foregoing and other objects in view, which will appear as the description proceeds, my invention resides in the novel dipper tooth point and in the details of construction thereof, hereinafter described and claimed, it bein understood that changes may be made within the scope of what is claimed Without departing from the spirit' of the invention.

The preferred embodiment of my invention is illustrated in the accompanying drawings, wherein Figure 1 is a view in pers ective of a dipper tooth point embodying t e characteristic features ofmy invention.

Fig. 2 is a top plan view thereof.

Fig. 3 is a view in vertical longitudinal section taken on the line 33 of Fig. 2.

Fig. 4 is a view in transverse vertical section taken on the line and Fig. 5 is a view in side elevation and partially in section, disclosing the manner in whlch the tooth wears in service and maintains a sharp extremity in so doing.

Referring specifically to the several views, my improved dipper tooth is composed of the wedge shaped body 10, from which proect the, rearwardly extending 'aws' 11, the latter being provided with suita le openings 12, for the reception of bolts or other equivalent means for securing the point to the tooth base. It is to be understood in this connection, however, that the wearing point, which is formed with the body 10, may either be detachably secured to a tooth base as illustrated in the accompanying drawings, or may be formed integral therewith.

The upper and lower 'aws 11, are preferably braced by the rein orcing web 13, and terminate at 14, which lies adjacent the cutting edge of the lip of a dipper with which my improved tooth is to be used. The upper and lower surfaces 15, of the wedge shaped body are provided with the panels or recesses 16, which extend at their sides to within a short distance of the sides 17 of the wedge shaped body of the tooth. The front extremities of the recesses terminate adjacent the front extremity of the wedge shaped body and extend rearwardly to approximately the juncture 14, of the upper and lower jaws of the dipper tooth. The bottom walls 18 of the recesses extend substantially parallel throughout approximately the forward half of their length and from thence gradually merge into the upper and lower surfaces 15 of the body.

In order to prevent foreign material, such as dirt and rocks from becoming packed or wedged in the recesses 16, I have preferably formed the side walls 19 thereof, sloping or diverging away from the bottom walls of the recesses as clearly illustrated in Fig. 4:.

With the tooth as thus constructed, I have found that during service the wear will take place more rapidly upon the sides and edges 17, of the body than upon the central portion of the surfaces 15. This fact in connection with the presence of the recesses 16, causes the tooth point to remain sharp as it 44 of Fig. 3;

Patented. Oct. 25, 1921-.

it has become worn in service.

wears away. This feature is clearly illustrated in Fig. 5 wherein the dotted lines illustrate the original configuration of the tooth point, and the full lines represent the approximate form of the tooth point after Further the original and triangular configuration of the sides of the wedge shaped body strengthen and brace the tooth point and embody suflicient strength and rigidity therein, so as to prevent the breakage or fracture of the tooth point in service.

From the foregoing it will be observed that I have provided a tooth point, which will remain sharp throughout the useful life thereof, and which feature I have found most materially aids and facilitates the operation of the excavating or dredging bucket upon which my improved dipper teeth or dipper teeth points are used.

Having thus described my invention, what I claim is 1. A dipper tooth comprising a wedge shaped body with the upper and lower surfaces thereof provided with panels or recesses adapted to cause the tooth to remain sharp during the useful wearing life thereof.

2. A tooth point comprising a wedge shaped body having panels or recesses in the upper and lower surfaces thereof, said recesses extending at their sides to within a short distance of the sides of the body and adapted to cause the point to remain sharp during the wear thereof.

3. A detachable and renewable point for dipper teeth comprising a wedge shaped body having rearwardly extending jaws for attachment to a tooth base, the central portion of the wedge shaped body being of restricted thickness formed by the presence of recesses in the upper and lower surfaces of the wedge shaped body and adapted to cause the point to remain sharp during the useful wearing life thereof.

4. A detachable and renewable point for dipper teeth, comprising a wedge shaped body, having rearwardly extending jaws for attachment to a tooth base, the upper and lower surfaces of the wedge shaped body provided with recesses extending at their sides to within a short distance of the sides of the body and terminating adjacent the front extremity of the point and adjacent a juncture of the upper and lower jaws of the point.

Signed at Chicago, in the county of Cook and State of Illinois, this 10th day of February A. D. 1920.

WALTER S. MoKEE.

Witnesses:

NELLIE C. BASON, EARL A. LERNER. 

